I would like to show you, how to make an on-board effects loop control (switch), as a part of your guitar wiring. It's something known by my from the Jerry Garcia's axe – Tiger.
The loop control will allow you to switch on and off some effect pedals by the toggle in your guitar body. It will also give you a possibility to shape the tone in a very unique way. The loop switch is placed before the volume pot, so you will be able to use it to control the pedal chain output. It means a lot of new, cool tones.
Diagram:
